The Wiggler

A wiggler is an arrangement of magnets configured so that, when inserted into the path of a beam of particles, it affects the properties of the beam.

Suggested in 1956 by K. W. Robinson of the Harvard University Cambridge Electron Accelerator (CEA) as a way to produce synchrotron radiation, 
the first wiggler was built by CEA in 1966 -- but it was installed as a damping component in a beam storage system.

It wasn't until 1979, at the Stanford Synchrotron Radiation Project (SSRP -- later renamed SSRL) that a wiggler was first built and installed to be used as a synchrotron radiation source. 

SSRL wiggler, 1978
First SSRL wiggler, front view, 1978 (SLAC)
Wiggler display at SLAC
Original SSRL wiggler, now on permanent display outdoors at SLAC (2002) (SLAC - Rogers)
Plaque on wiggler display
Plaque on SSRL first wiggler display (SLAC - Rogers)

References